Based on your description of the symptoms I think it is likely that you are suffering from panic attacks, rather than a cardiac condition, especially since multiple studies of your heart were normal. I would check a thyroid function and electrolytes before seeing the psychiatrist, just to make sure that there are no reversible medical conditions which could manifest as panic attacks. Good Luck!
Thank you everyone for your comments. I am having further testing and have made an appt. with a shrink...lol
You are describing the classic--and I mean classic--symptoms of a panic attack. I mean, the 'desire to escape' is textbook!
I have panic attacks myself. They are seriously not fun, because you start to take your physical symptoms soooo seriously, even though repeated tests have shown nothing wrong, as in nada, zero, zilch.
Here is what worked for me: I did in fact see a psychiatrist, who diagnosed--you guessed it--panic attacks. He prescribed medication, since he believes (as I do) that this is a medical problem and not a matter of strength of will or whatever. My guy really knows his physiology and pharmacology, and was able to choose intelligently among the meds available, bearing in mind the fact that I do actually have some mild heart issues.
In my case, my panic attacks come in bunches every few years when I am for some reason susceptible to them. Having tried about five different SSRIs, I have settled on low-dose Zoloft as the best for me, and I take the drug for about four months (long enough for my internal alarm system to 'cool off,' as my shrink puts it), and then taper off.
I'm fine then for another couple of years, and when the attacks return, I know that there's help for me. Thank goodness, there really is help.
Go ahead and see a shrink. The hardest part is picking up that phone and making an appointment. The assessment is actually easy and quite a relief.